Android SearchView介绍及搜索提示实现

 示例APK可从这些地址下载：Google Play,  360手机助手,  百度手机助手,  小米应用商店,  豌豆荚

1. layout文件

Java

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<? xml version = "1.0" encoding = "utf-8" ?> < RelativeLayout xmlns : android = "http://schemas.android.com/apk/res/android"      android : layout_width = "match_parent"      android : layout_height = "match_parent" >        < SearchView          android : id = "@+id/search_view"          android : layout_width = "match_parent"          android : layout_height = "match_parent"          android : iconifiedByDefault = "true"          android : inputType = "textCapWords"          android : imeOptions = "actionSearch"          android : queryHint = "" / >   < / RelativeLayout >

xml中主要配置有四个属性，如下：

android:iconifiedByDefault表示搜索图标是否在输入框内。true效果更加
android:imeOptions设置IME options，即输入法的回车键的功能，可以是搜索、下一个、发送、完成等等。这里actionSearch表示搜索
android:inputType输入框文本类型，可控制输入法键盘样式，如numberPassword即为数字密码样式
android:queryHint输入框默认文本

 

2. java部分代码
SearchView几个主要函数
setOnCloseListener(SearchView.OnCloseListener listener)表示点击取消按钮listener，默认点击搜索输入框
setOnQueryTextListener(SearchView.OnQueryTextListener listener)表示输入框文字listener，包括public boolean onQueryTextSubmit(String query)开始搜索listener，public boolean onQueryTextChange(String newText)输入框内容变化listener，两个函数，下面代码包含了如何利用延迟执行实现搜索提示

Java部分实现

Java

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package cn . trinea . android . demo ;   import java . util . concurrent . Executors ; import java . util . concurrent . ScheduledExecutorService ; import java . util . concurrent . ScheduledFuture ; import java . util . concurrent . TimeUnit ;   import android . app . ActionBar ; import android . app . ActionBar . LayoutParams ; import android . app . Activity ; import android . content . Context ; import android . os . Bundle ; import android . os . Handler ; import android . os . Message ; import android . view . Gravity ; import android . view . LayoutInflater ; import android . view . MenuItem ; import android . view . View ; import android . view . WindowManager ; import android . widget . SearchView ; import android . widget . SearchView . OnCloseListener ; import android . widget . Toast ;   public class SearchViewDemo extends Activity {        private SearchView               searchView ;      private Context                   context ;      private MyHandler                 handler ;        // schedule executor      private ScheduledExecutorService scheduledExecutor = Executors . newScheduledThreadPool ( 10 ) ;      private String                    currentSearchTip ;        @Override      protected void onCreate ( Bundle savedInstanceState ) {          super . onCreate ( savedInstanceState ) ;          setContentView ( R . layout . search_view_demo ) ;          context = getApplicationContext ( ) ;          handler = new MyHandler ( ) ;            ActionBar actionBar = getActionBar ( ) ;          actionBar . setDisplayOptions ( ActionBar . DISPLAY_SHOW_TITLE | ActionBar . DISPLAY_HOME_AS_UP                                      | ActionBar . DISPLAY_SHOW_CUSTOM ) ;          setTitle ( " " ) ;          LayoutInflater inflater = ( LayoutInflater ) getSystemService ( Context . LAYOUT_INFLATER_SERVICE ) ;          View customActionBarView = inflater . inflate ( R . layout . search_view_demo_title , null ) ;            searchView = ( SearchView ) customActionBarView . findViewById ( R . id . search_view ) ;          searchView . setIconified ( false ) ;          searchView . setOnCloseListener ( new OnCloseListener ( ) {                @Override              public boolean onClose ( ) {                  // to avoid click x button and the edittext hidden                  return true ;              }          } ) ;          searchView . setOnQueryTextListener ( new SearchView . OnQueryTextListener ( ) {                public boolean onQueryTextSubmit ( String query ) {                  Toast . makeText ( context , "begin search" , Toast . LENGTH_SHORT ) . show ( ) ;                  return true ;              }                public boolean onQueryTextChange ( String newText ) {                  if ( newText != null && newText . length ( ) > 0 ) {                      currentSearchTip = newText ;                      showSearchTip ( newText ) ;                  }                  return true ;              }          } ) ;          LayoutParams params = new LayoutParams ( LayoutParams . WRAP_CONTENT ,                                                LayoutParams . WRAP_CONTENT , Gravity . CENTER_VERTICAL                                                                            | Gravity . RIGHT ) ;          actionBar . setCustomView ( customActionBarView , params ) ;            // show keyboard          getWindow ( ) . setSoftInputMode ( WindowManager . LayoutParams . SOFT_INPUT_ADJUST_RESIZE                                              | WindowManager . LayoutParams . SOFT_INPUT_STATE_VISIBLE ) ;      }        public void showSearchTip ( String newText ) {          // excute after 500ms, and when excute, judge current search tip and newText          schedule ( new SearchTipThread ( newText ) , 500 ) ;      }        class SearchTipThread implements Runnable {            String newText ;            public SearchTipThread ( String newText ) {              this . newText = newText ;          }            public void run ( ) {              // keep only one thread to load current search tip, u can get data from network here              if ( newText != null && newText . equals ( currentSearchTip ) ) {                  handler . sendMessage ( handler . obtainMessage ( 1 , newText + " search tip" ) ) ;              }          }      }        public ScheduledFuture < ? > schedule ( Runnable command , long delayTimeMills ) {          return scheduledExecutor . schedule ( command , delayTimeMills , TimeUnit . MILLISECONDS ) ;      }        @Override      public boolean onOptionsItemSelected ( MenuItem item ) {          switch ( item . getItemId ( ) ) {              case android . R . id . home : {                  onBackPressed ( ) ;                  return true ;              }          }          return false ;      }        private class MyHandler extends Handler {            @Override          public void handleMessage ( Message msg ) {                switch ( msg . what ) {                  case 1 :                      Toast . makeText ( context , ( String ) msg . obj , Toast . LENGTH_SHORT ) . show ( ) ;                      break ;              }          }      }   }

上面代码在onQueryTextChange函数即输入框内容每次变化时将一个数据获取线程SearchTipThread放到ScheduledExecutorService中，500ms后执行，在线程执行时判断当前输入框内容和要搜索内容，若相等则继续执行，否则直接返回，避免不必要的数据获取和多个搜索提示同时出现。

 

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
| WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
表示默认输入法弹出

 

编辑框内容为空点击取消的x按钮，编辑框收缩，可在onClose中返回true

Java

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searchView . setOnCloseListener ( new OnCloseListener ( ) {        @Override      public boolean onClose ( ) {          return true ;      } } ) ;

searchView.onActionViewExpanded();表示在内容为空时不显示取消的x按钮，内容不为空时显示.

searchView.setSubmitButtonEnabled(true);编辑框后显示search按钮，个人建议用android:imeOptions=”actionSearch”代替。

 

隐藏输入法键盘

Java

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InputMethodManager inputMethodManager ; inputMethodManager = ( InputMethodManager ) getSystemService ( Context . INPUT_METHOD_SERVICE ) ;   private void hideSoftInput ( ) {      if ( inputMethodManager != null ) {          View v = SearchActivity . this . getCurrentFocus ( ) ;          if ( v == null ) {              return ;          }            inputMethodManager . hideSoftInputFromWindow ( v . getWindowToken ( ) ,                                                    InputMethodManager . HIDE_NOT_ALWAYS ) ;          searchView . clearFocus ( ) ;      } }

其中SearchActivity为Activity的类名